| 摘要 |
PURPOSE:To obtain an even base line by dividing luminous flux having different two wavelengths into four luminous flux of control light and sample light to introduce them to a control sample and a reference sample, and adopting the ratio of a signal ratio of the sample light to the control light in terms of one wavelength light to the ratio in terms of another wavelength light. CONSTITUTION:White light emitted from a light source 1 is diffracted to the light having different two wavelengths by spectroscopes 2, 3. Said light are introduced to the same position of two luminous flux dividing mechanism 4, divided respectively into two luminous flux, and said flux are absorbed by the control sample 5 and a sample 6 to be measured respectively and introduced to a detector 7. A signal discriminating circuit 8 discriminates signals S1 and R1 of the sample and reference light in terms of one wavelength light, and signals S2 and R2 of the sample and reference lights in terms of another wavelength light. These signals are subjected to calculation of (S1/R1)/(S2/R2) by a processor 9, and the result is displayed on a display device 10. In this way, the base line is evened and the light source brightness variation is corrected. |
